INCIDENT EVIDENCE GRAPH

Microsoft warns of surge in ACR Stealer attacks on customers

2026-07-18T14:17:19Z

Microsoft has observed a surge in attacks using the ACR Stealer malware to steal browser-stored passwords, authentication tokens, and sensitive documents from its enterprise customers. [...]

• Victim: Microsoft enterprise customers
• Actor: Threat actors using ACR Stealer
• Method: ACR Stealer malware deployment

Primary evidence

1. Microsoft warns of surge in ACR Stealer attacks on customers

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